Don't ask the browser for Autofill suggestions for non-autofillable form fields.

chrome/renderer/autofill/form_autofill_util.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_AUTOFILL_FORM_AUTOFILL_UTIL_H_
 #define CHROME_RENDERER_AUTOFILL_FORM_AUTOFILL_UTIL_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 67 matching lines @@
     const WebKit::WebFormElement& form_element,
     const WebKit::WebFormControlElement& form_control_element,
     RequirementsMask requirements,
     ExtractMask extract_mask,
     webkit_glue::FormData* form,
     webkit_glue::FormField* field);
 
 // Finds the form that contains |element| and returns it in |form|.  Fills
 // |field| with the |FormField| representation for element.
 // Returns false if the form is not found.
-bool FindFormAndFieldForFormControlElement(
-    const WebKit::WebFormControlElement& element,
-    webkit_glue::FormData* form,
-    webkit_glue::FormField* field);
+bool FindFormAndFieldForInputElement(const WebKit::WebInputElement& element,
+                                     webkit_glue::FormData* form,
+                                     webkit_glue::FormField* field,
+                                     RequirementsMask requirements);
 
 // Fills the form represented by |form|.  |element| is the input element that
 // initiated the auto-fill process.
 void FillForm(const webkit_glue::FormData& form,
               const WebKit::WebInputElement& element);
 
 // Previews the form represented by |form|.  |element| is the input element that
 // initiated the preview process.
 void PreviewForm(const webkit_glue::FormData& form,
                  const WebKit::WebInputElement& element);
 
 // Clears the placeholder values and the auto-filled background for any fields
 // in the form containing |node| that have been previewed.  Resets the
 // autofilled state of |node| to |was_autofilled|.  Returns false if the form is
 // not found.
 bool ClearPreviewedFormWithElement(const WebKit::WebInputElement& element,
                                    bool was_autofilled);
 
 // Returns true if |form| has any auto-filled fields.
 bool FormWithElementIsAutofilled(const WebKit::WebInputElement& element);
 
 }  // namespace autofill
 
 #endif  // CHROME_RENDERER_AUTOFILL_FORM_AUTOFILL_UTIL_H_